HD 187123 c is an extrasolar planet located approximately 156 light-years away in the constellation of Cygnus, orbiting the star HD 187123. This planet was published in 2006. The radius of the planet's orbit is 4.80 AU, 113 times more distant from the star than first companion. This takes 10 years to orbit. As it is typical for very long-period planets, the orbit is eccentric, referring to as "eccentric Jupiter". At periastron, the orbital distance is 3.60 AU and at apastron, the distance is 6.00 AU. The planet's mass is nearly 2 times that of Jupiter, but is likely to be smaller in size than the inner planet.[2][3]
| Discovery | |
|---|---|
| Discovered by | Wright et al. |
| Discovery site | California, USA |
| Discovery date | November 2006 |
| radial velocity | |
| Orbital characteristics | |
| 4.417±0.054 AU | |
| Eccentricity | 0.280±0.022[1] |
| 3324±46[1] d | |
| 2453625±40[1] | |
| 258.5±3.9[1] | |
| Semi-amplitude | 25.10±0.44[1] |
| Star | HD 187123 |
See also
editReferences
edit- ^ a b c d e Feng, Y. Katherina; et al. (2015). "The California Planet Survey IV: A Planet Orbiting the Giant Star HD 145934 and Updates to Seven Systems with Long-period Planets". The Astrophysical Journal. 800 (1). 22. arXiv:1501.00633. Bibcode:2015ApJ...800...22F. doi:10.1088/0004-637X/800/1/22. S2CID 56390823.
- ^ Wright, J. T.; et al. (2007). "Four New Exoplanets and Hints of Additional Substellar Companions to Exoplanet Host Stars". The Astrophysical Journal. 657 (1): 533–545. arXiv:astro-ph/0611658. Bibcode:2007ApJ...657..533W. doi:10.1086/510553. S2CID 35682784.
- ^ Wright, J. T.; et al. (2009). "Ten New and Updated Multi-planet Systems, and a Survey of Exoplanetary Systems". The Astrophysical Journal. 693 (2): 1084–1099. arXiv:0812.1582. Bibcode:2009ApJ...693.1084W. doi:10.1088/0004-637X/693/2/1084. S2CID 18169921.
External links
edit- "Notes for planet HD 187123 c". Extrasolar Planets Encyclopaedia. Retrieved 2008-08-25.
- "HD 187123". Exoplanets. Archived from the original on 2009-11-24. Retrieved 2008-08-25.
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